package com.vertonur.filters;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

public class ResParamCharacterEncodingFilter implements Filter {
	private String encoding = null;

	// protected FilterConfig filterConfig=null;

	public void init(FilterConfig filterConfig) throws ServletException {
		// this.filterConfig=filterConfig;
		this.encoding = filterConfig.getInitParameter("encoding");
	}

	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		if (request.getCharacterEncoding() == null) {
			String encode = getEncoding();
			// System.out.println(encode);
			if (encode != null)
				request.setCharacterEncoding(encode);
		}
		chain.doFilter(request, response);
	}

	private String getEncoding() {
		return encoding;
	}

	public void destroy() {
		encoding = null;
		// filterConfig=null;
	}
}